PIC24FJ128GB MICROCHIP [Microchip Technology], PIC24FJ128GB Datasheet - Page 239
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PIC24FJ128GB
Manufacturer Part Number
PIC24FJ128GB
Description
64/80/100-Pin, 16-Bit Flash Microcontrollers with USB On-The-Go (OTG)
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC24FJ128GB.pdf
(328 pages)
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19.1.3
REGISTER 19-1:
© 2008 Microchip Technology Inc.
bit 15
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9-8
Note 1:
RTCEN
R/W-0
R/W-0
CAL7
2:
3:
(2)
The RCFGCAL register is only affected by a POR.
A write to the RTCEN bit is only allowed when RTCWREN = 1.
This bit is read-only. It is cleared to ‘0’ on a write to the lower half of the MINSEC register.
RTCC CONTROL REGISTERS
RTCEN: RTCC Enable bit
1 = RTCC module is enabled
0 = RTCC module is disabled
Unimplemented: Read as ‘0’
RTCWREN: RTCC Value Registers Write Enable bit
1 = RTCVALH and RTCVALL registers can be written to by the user
0 = RTCVALH and RTCVALL registers are locked out from being written to by the user
RTCSYNC: RTCC Value Registers Read Synchronization bit
1 = RTCVALH, RTCVALL and ALCFGRPT registers can change while reading due to a rollover ripple
0 = RTCVALH, RTCVALL or ALCFGRPT registers can be read without concern over a rollover ripple
HALFSEC: Half-Second Status bit
1 = Second half period of a second
0 = First half period of a second
RTCOE: RTCC Output Enable bit
1 = RTCC output enabled
0 = RTCC output disabled
RTCPTR1:RTCPTR0: RTCC Value Register Window Pointer bits
Points to the corresponding RTCC Value registers when reading RTCVALH and RTCVALL registers;
the RTCPTR<1:0> value decrements on every read or write of RTCVALH until it reaches ‘00’.
RTCVAL<15:8>:
00 = MINUTES
01 = WEEKDAY
10 = MONTH
11 = Reserved
RTCVAL<7:0>:
00 = SECONDS
01 = HOURS
10 = DAY
11 = YEAR
R/W-0
CAL6
resulting in an invalid data read. If the register is read twice and results in the same data, the data
can be assumed to be valid.
U-0
—
RCFGCAL: RTCC CALIBRATION AND CONFIGURATION REGISTER
W = Writable bit
‘1’ = Bit is set
RTCWREN
R/W-0
R/W-0
CAL5
(2)
RTCSYNC
PIC24FJ256GB110 FAMILY
R/W-0
CAL4
R-0
(3)
Preliminary
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
HALFSEC
R/W-0
CAL3
R-0
(3)
RTCOE
R/W-0
R/W-0
CAL2
x = Bit is unknown
RTCPTR1
R/W-0
R/W-0
CAL1
(1)
DS39897B-page 237
RTCPTR0
R/W-0
R/W-0
CAL0
bit 8
bit 0
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